minecraft-bedrock-json-schemas/source/general/particle/identifier.json

{
  "$id": "blockception.minecraft.particle.identifier.1.8.0",
  "type": "string",
  "title": "Particle Identifier 1.8.0",
  "description": "The minecraft particle identifier",
  "pattern": "^[0-9a-zA-Z:_\\.\\-]+$"
}